1428567 has 16 divisors (see below), whose sum is σ = 2215680. Its totient is φ = 801792.

The previous prime is 1428541. The next prime is 1428571. The reversal of 1428567 is 7658241.

It is not a de Polignac number, because 1428567 - 2¹¹ = 1426519 is a prime.

1428567 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1428587) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 663 + ... + 1815.

It is an arithmetic number, because the mean of its divisors is an integer number (138480).

2^1428567 is an apocalyptic number.

1428567 is a deficient number, since it is larger than the sum of its proper divisors (787113).

1428567 is a wasteful number, since it uses less digits than its factorization.

1428567 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1222.

The product of its digits is 13440, while the sum is 33.

The square root of 1428567 is about 1195.2267567286. The cubic root of 1428567 is about 112.6246716653.

The spelling of 1428567 in words is "one million, four hundred twenty-eight thousand, five hundred sixty-seven".